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Fudgy Chocolate Sheet Cake with Cocoa Icing

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This Fudgy Chocolate Sheet Cake with Cocoa Icing is the perfect way to serve dessert to a crowd. Who doesn’t love a tender, frosted slice of chocolate cake??

Fudgy Chocolate Sheet Cake with Cocoa Icing on a white dessert plate with ice cream, mint and raspberries

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Fudgy Chocolate Sheet Cake with Cocoa Icing

It’s pretty much a given that any party I’m hosting will have a chocolate dessert on the menu! From an exquisite flourless chocolate cake topped with berries to blissful molten lava cakes to dense, delectable fudgy brownies, I’ve made them all. But if I’m feeding a crowd,  a chocolate sheet cake makes most sense. Squares of this dense cake are topped with a cocoa icing that’s reminiscent of fudge. Yeah, how can that be bad??

Slice of Fudgy Chocolate Sheet Cake with Cocoa Icing on a square white plate with raspberries and mint

A Double Dose of Chocolate

This cake has more chocolate intensity than our favorite chocolate syrup brownies, so a scoop of vanilla ice cream is a nice complement. Sweetened whipped cream and berries would also jazz up these squares of deliciousness! I was told I can make this one again, and that’s high praise around here. Even Katie enjoyed a slice of this fudgy chocolate sheet cake, and she’s a hard sell when it comes to chocolate desserts. What’s your favorite dessert to feed a crowd? If you don’t have one, I recommend this fudgy chocolate sheet cake, of course. And don’t forget the cocoa icing for double the yum!

Ice cream topped Fudgy Chocolate Sheet Cake with Cocoa Icing on a white dessert plate

Progressive Eats
Welcome to Progressive Eats, our virtual version of a Progressive Dinner Party. Our menu this month features recipes to help you celebrate the last long weekend of the summer, Labor Day! Weโ€™ve got a great mix of recipes from appetizer to desserts, starting with a cocktail, then fabulous dishes perfect for picnics, potlucks, and barbecues! Hosting this month is Jane from The Heritage Cook.

Holiday Weekend Favorites



Main Course

Vegetable/Side Dish


If you’re unfamiliar with the concept, a progressive dinner involves going from house to house, enjoying a different course at each location. With Progressive Eats, a theme is chosen each month, members share recipes suitable for a delicious meal or party, and you can hop from blog to blog to check them out.

Used in This Fudgy Chocolate Sheet Cake Recipe:

More Desserts to Feed a Crowd:


Chocolate Sheet Cake slice on a square white plate with raspberries

Chocolate Sheet Cake

The perfect way to serve chocolate cake to a crowd!

Prep Time 30 minutes
Cook Time 20 minutes
Total Time 50 minutes
Yield 24 servings


For the cake:

  • 2 cups flour
  • 2 cups sugar
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon salt
  • 2 eggs
  • 2 egg yolks
  • 2 teaspoons vanilla
  • 1/4 cup sour cream
  • 8 ounces semi-sweet chocolate, chopped
  • 4 tablespoons (1/2 stick/2 ounces) butter
  • 3/4 cup vegetable oil
  • 3/4 cup hot water
  • 1/2 cup Dutch-processed cocoa powder

For the icing:

  • 1 stick (8 tablespoons/4 ounces) butter
  • 1/2 cup heavy cream
  • 1/2 cup Dutch-processed cocoa powder
  • 1 tablespoon light corn syrup
  • 3 cups powdered sugar
  • 1 tablespoon vanilla


  1. Preheat oven to 350º. Grease 18- by 13-inch (half-sheet cake sized) rimmed baking sheet. Put flour, sugar, baking soda, and salt in large bowl and whisk to combine. Whisk eggs and yolks, vanilla, and sour cream in another bowl until smooth.
  2. Microwave chocolate, butter, oil, water, and cocoa in a large Pyrex measuring cup or microwave safe bowl till chocolate is soft. Whisk till smooth...microwave a little longer if all chocolate is not melted.
  3. Whisk chocolate mixture into flour mixture until well combined. Whisk egg mixture into batter, then pour into prepared pan. Bake until a toothpick inserted into center comes out clean, 18 to 20 minutes. Transfer to a wire rack to cool.
  4. About 5 minutes before cake is done, heat butter, cream, cocoa, and corn syrup in large saucepan over medium heat, stirring occasionally, until smooth. Take off heat and, whisk in powdered sugar and vanilla. Spread warm icing over hot cake.
  5. Let cake cool to room temperature on wire rack, about 1 hour, then refrigerate until icing is set, about 1 hour. Cut and serve.


Adapted from Cook's Country.

Nutrition Information:



Serving Size:

1 slice

Amount Per Serving: Calories: 312Total Fat: 13gSaturated Fat: 4gTrans Fat: 0gUnsaturated Fat: 8gCholesterol: 38mgSodium: 82mgCarbohydrates: 48gFiber: 2gSugar: 36gProtein: 3g


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Note: This post may contain affiliate links; view my Disclosure Policy for details. I earn a small percentage from any purchase you make by clicking on these links at no extra cost to you.

49 comments on “Fudgy Chocolate Sheet Cake with Cocoa Icing”

  1. Excellent!

  2. Liz, wonderful dessert and gorgeous photos:)

  3. Ohhhhh this looks so scrumptious Lizzy! My only worry is that I doubt I’d be able to let it cool down for 2 hours before devouring it!!!!!!! Yes… I love chocolate… ๐Ÿ˜‰
    Manu (Manu’s Menu)

  4. Sweets would be a hard one for me to give up too. I love me some chocolate cake!

  5. Another great cake in your blog and great pictures that just make everyone want that cake ๐Ÿ™‚

  6. simple, elegant great photo!

  7. Poor Nick but what willpower! Great idea to make this when he’s away, though. I can’t honestly imagine there will be a crumb of evidence left of it on his return!

  8. This looks amazing! I love a good chocolate sheet cake. Yummy!

  9. Oh, that does look tempting, tempting enough to lure Mr. Rosemary, the only one here who can give up sweets. Poor Nick, till next time.

  10. Chocolate and vanilla ice-cream are always perfect combination! Lizzy, the chocolate sheet cake make me craving for the chocolate ๐Ÿ™‚

  11. You have truly elevated the humble chocolate sheet cake, Lizzy!

  12. Oh if they can’t get it finished feel free to send some over here. My daugher’s birthday is coming up and I am sure she would love it if I tried this recipe out for her.

  13. OOhhh your pictures are teasing me the chocolate is calling me LOL I think I need another chocolate fix today ๐Ÿ™‚ yummy!!! And beautiful pictures!

  14. Oh my word does this cake look soooo good. I wish I had a huge piece (or two) of it right now. ๐Ÿ™‚

  15. That looks really dense, almost like a brownie. I’m sure I would love this!

  16. One of my favorite things to eat, that icing is da’bomb

  17. How absolutely gorgeous, Lizzy!! That looks so bautiful and rich- yum! ๐Ÿ™‚
    Thank you for emailing me about the recipe compilation for Monet. I will certainly participate and send Kate the recipe as soon as I can!


  18. Thanks, everyone!!! Chocolate ALWAYS goes over well here ๐Ÿ™‚

  19. This cake sounds amazing! It would be especially good with a glass of soy milk! I love that it is baked in a sheet, and easy to prepare :)!

  20. Oh – I’ve actually made this one! I loved the deeper chocolate flavor in this cake than some other texas sheet cakes I made in the past. This one stays true to the flavor. I can vouch that it some GOOD EAT!!
    Your picture is gorgeous Lizzy!!

  21. How funny. Just awhile ago I thought that it was odd that I’d never seen a sheet cake on food blogs. This looks delicious!

  22. I love Cook’s Country! This cake looks so rich, I know my husband would love it. I am definitely bookmarking it ๐Ÿ™‚

  23. this cake looks sinfully delicious. Love the strong chocolate flavor.
    Thanks for sharing Lizzy

  24. this looks seriously great! thanks for sharing, lots of love happening for this and all your posts ๐Ÿ™‚

  25. I just posted a texas sheet cake recipe that I used from Cook’s Country and I googled and saw that you used it also. Man was it ever delicious. We saw the episode a coupleweeks ago and I knew I had to try it!

  26. Pinning to my favorite chocolate board! This looks fantastic – everyone would love it. Thanks!

  27. This recipe comes at the right time. My teen’s friends have started to hang at our home for lunch. I was wondering what to make for them next! they will devour this!

  28. My goodness Liz, another chocolate masterpiece. This is perfect for parties and potlucks, love the frosting.

  29. Oh, yes, Liz! This is the perfect chocolate dessert for a crowd. Delicious!

  30. I love sheet cakes and this one is outstanding! That fudge frosting – swoon!! Another winner Liz!

  31. This looks wonderful. I love flourless chocolate cake and have always wanted to recreate that fudgy intense chocolate flavor in a regular cake, but my general experience with cake is lacking. This looks delicious and not too difficult!
    – Sierra

  32. While I don’t normally love chocolate on chocolate I so want a slice of this with vanilla ice cream and raspberries. My FAVORITE combination of flavors! Looks lovely Liz.

  33. Liz, Sheet cakes are wonderful, especially chocolate ones. Although these days I’m mostly laughing when I see a sheetcake (courtesy of Tina Fey’s hysterical SNL Weekend Update bit), when it comes to yours, I’m just drooling.

  34. I love a good sheet cake! This looks delicious!

  35. Chocolate and vanilla ice cream is a classic. I have noticed all your lovely chocolate desserts lately.

  36. Oh wow that looks fabulous! Your photos are amazing Liz!

  37. This looks really good — who can resist chocolate? Or a sheet cake? In fact, in times like these we all need more sheet cakes. ๐Ÿ™‚ Anyway, good stuff — thanks.

  38. This chocolate cheesecake looks so stunning, Liz. Love how beautifully you have served it with vanilla ice-cream.

  39. Anything chocolate is always my favorite dessert. If I am making a dessert for a gathering it is always chocolate too. I will have to put this one on my list. It looks so yummy!

  40. Wow – just two days ago I asked my mom for the chocolate sheet cake of my childhood. It was the best and I’m hoping to recreate it soon to share with my children. My favorite way to eat it was with vanilla ice cream. I would mix the cake and ice cream in a bowl to a gooey, yummy blend. Takes me back to being a kid when life was simple…

    Your cake looks perfect! Wishing I had some to close my day today…

  41. Such lovely bake, dear! I could finish them in no time. xoxo

  42. You can never go wrong with a fudgy chocolate cake! This is perfection ๐Ÿ™‚

  43. This slice of chocolate heaven is just what I need to satisfy my chocolate craving. I doubt that there would be any leftovers.

  44. Your desserts always look divine and this is no exception, Liz =) Sheet crowds are great for crowds =) Ps Chocolate is pretty much a must for any party, nest-ce pas?

  45. Such a delicious and simple dessert! It was the perfect cake to bring to a dinner party. Thanks for another delicious recipe!ย 

  46. nothing beats a chocolate sheet cake as far as I’m concerned. can’t wait to make this recipe!

  47. OMG that icing! I am obsessed! Every chocolate lover’s dream.

  48. This was so good! My kids were asking for more! Can’t wait to make it again!

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